Kill off poll_interruptions(); it is lethal when we're acting as a PXE

stack or INT 13 emulator etc.

src/core/misc.c

 	return seed;
 }
 
-/**************************************************************************
-POLL INTERRUPTIONS
-**************************************************************************/
-void poll_interruptions(void)
-{
-	int ch;
-	if ( ! as_main_program ) return;
-	/* If an interruption has occured restart etherboot */
-	if (iskey() && (ch = getchar(), (ch == K_ESC) || (ch == K_EOF) || (ch == K_INTR))) {
-		int state = (ch != K_INTR)? -1 : -3;
-		longjmp(restart_etherboot, state);
-	}
-}
-
 /**************************************************************************
 SLEEP
 **************************************************************************/
 	unsigned long tmo;
 
 	for (tmo = currticks()+secs*TICKS_PER_SEC; currticks() < tmo; ) {
-		poll_interruptions();
 	}
 }
 

src/core/nic.c

 		if (result == 0) {
 			/* We don't have anything */
 		
-			/* Check for abort key only if the Rx queue is empty -
-			 * as long as we have something to process, don't
-			 * assume that something failed.  It is unlikely that
-			 * we have no processing time left between packets.  */
-			poll_interruptions();
 			/* Do the timeout after at least a full queue walk.  */
 			if ((timeout == 0) || (currticks() > time)) {
 				break;

src/core/pcmcia.c

 void	sleepticks(int numticks ) {
 	u_int	tmo;
 	for (tmo = currticks()+numticks; currticks() < tmo; ) {
-                poll_interruptions();
         }
 	return;
 }

src/core/timer.c

 	unsigned int i;
 	for(i = 0; i < msecs; i++) {
 		udelay(1000);
-		poll_interruptions();
 	}
 }
 
 {
 	load_timer2(ticks);
 	while(timer2_running()) {
-		poll_interruptions();
 	}
 }

src/drivers/net/e1000.c

 	E1000_WRITE_REG (&hw, TDT, tx_tail);
 	while (!(txp->upper.data & E1000_TXD_STAT_DD)) {
 		udelay(10);	/* give the nic a chance to write to the register */
-		poll_interruptions();
 	}
 	DEBUGFUNC("send end");
 }

src/drivers/net/tg3.c

 	while((tp->hw_status->idx[0].tx_consumer != entry) &&
 		(tp->hw_status->idx[0].tx_consumer != PREV_TX(entry))) {
 		mdelay(10);	/* give the nick a chance */
-		poll_interruptions();
 		if (++i > 500) { /* timeout 5s for transmit */
 			printf("transmit timed out\n");
 			tg3_halt(tp);

src/include/etherboot.h

 extern void twiddle P((void));
 extern void sleep P((int secs));
 extern void interruptible_sleep P((int secs));
-extern void poll_interruptions P((void));
 extern int strcasecmp P((const char *a, const char *b));
 extern char *substr P((const char *a, const char *b));